Water-tube boiler



, (No Mode 1.) 9

, J. PIERPOINT;

WATER TUB-15, BOILER.

No. 490,923. PatentedJa -M, 1893...

' TATES JAMES PIERPOINT, OF PITTSBURG, PENNSYLVANIA.

WATER-TU BE BOILER.

SPECIFICATION forming part of Letters Patent No. 490,923, dated January31, 1893.

fierial No. 425,714. (No model.)

To all whom it may concern.-

Be it known that I, JAMEs PIERPOINT, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new andusefullmprovement in Water-Tube Boilers, of which the following is afull, clear, and exact description, reference being bad to theaccompanying drawing, forming part of this specification, whichillustrates a longitudinal sectional view of a water-tube boilerconstrncted in accordance with my invention.

In the setting of boilers it is often found necessary to place the samein positions where the vertical space is Very limited, such as thecellars of buildings, and my invention is designed to produce a boilerwhich is so constructed that its vertical height is small, so that it iseasily set in such locations.

In the drawing, in which similar numerals indicate corresponding parts,2 and 3 indicate steam and water-drums located in substantially the samehorizontal line, and 4 a steam-drum held between the same and connectedtherewith by pipes 5,while the drums themselves are connected by pipes18. Atile partition wall 6 extends between the drums 2 and 3 below thesteam-drum and above pipes 18, and two sets of tubes 7 and 8 connectsaid drums with mud-drums 9 and 10. There are preferably six tubes ineach of these sets, and the tubes are curved at their ends as shown toenter the drums in a substantially radial line.

The mud-drums 9 and 10 are connected by a pipe 11, and a smaller muddrum12 is set directly beneath the drum 9,a larger pipe 19 connecting them.A shield or partition-wall 13, composed of tiles, is placed immediatelyabove thelower set of tubes,this wall extending from the drum 3 to apoint adjacent to the muddrum 10, so that the products of combustionrising from the fire-place 14 impinge against the drum 3 and tubes 8 andfollow the tubes downwardly to the end of the tile wall, when they riseand come in contact with the set of tubes 7. A similar wall 15 isprovided above this set extending from the mud-drum 9 to a point nearthe steam and water-drum 2, so

ing wall over the drum 5 and connecting tubes, to allow access of theproducts of combustion to the steam drum in order to superheat the steamtherein;

The operation is as follows:The water entering the drum 2 passes downthrough the tubes 7 to the mud-drum 9, thence to the mud-drum 10 andtubes 8 to the drum 3, whence it returns by the pipes 18 to the drum 2,thus keeping up a constant circulation. The steam passes into the drum4, whence it is drawn for use and the sediment settles in the mud-drums,the residue in the drum9 descending into the drum 12, whence it isremoved from time to time.

The advantages of my construction are obvious. A boiler of very smallheight is atforded, while the sediment is collected in the mud-drumbefore the water passes to the more highly heated tubes 8 and drum 3.

The boiler is found to give a very high efficiency, as there is anequable distribution of the products of combustion,and the same are keptin contact with the tubes and drums during their passage to the stack.

That I claim is 1. A water-tube boiler, consisting of two steamand waterdrums having connecting tubes, a steam-drum connecting with these drums,two mud-drums located in the rear thereof, tubes connecting the drumswith the steam and water drums, pipes connecting these mud-drums, and anadditional muddrum located beneath and connecting with one of saidmud-drums; substantially as and for the purposes described.

2. A water-tube boiler, consisting of two steam and water-drums havingconnectingtubes, a steam-drum connecting With these drums, two mud-drumslocated in the rear thereof, tubes connecting the drums with the steamand Water-drums, pipes connecting these mud-drums, partition-walls overthe pipes connecting the mud-drums t0 the steam and Water-drums, and anadditional muddrum located beneath and connecting with one of the firstmentioned mud-drums; substantially as described. IO

In testimony whereof I have hereunto set my hand this 19th day of March,A. D. 1892.

JAMES PIERPOINT.

Witnesses:

H. M. CORWIN, C. BYRNES.

